Scrape-off layer plasma impurities and the choice of candidate materials for the fusion reactor first wall

V. S. Vojtsenya, S. A. Cohen

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Analysis of impurity flux measurements in the scrape-off regions of numerous tokamaks shows that, at existing near-wall plasma parameters, the contribution of impurity ions to the sputtering of surfaces located in the scrape-off layer is larger than that of hydrogenic ions. Nevertheless, this places only a weak constraint on the use of high-Z elements in the materials of the first-wall components of fusion reactors, if impurity transport and light-impurity ion content remain close to those in present-day devices.

Original languageEnglish (US)
Pages (from-to)611-617
Number of pages7
JournalJournal of Nuclear Materials
Volume176-177
Issue numberC
DOIs
StatePublished - Dec 3 1990

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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